Reducing Flood Losses Through the International Codes

Reducing Flood Losses Through the International Codes: Coordinating Building Codes and Floodplain Management Regulations 5th Edition, October 2019

TABLE OF CONTENTS

Acronyms and Abbreviations ............................................................................. vii

Chapter 1 Introduction .............................................................................. 1-1

Chapter 2 Approaches to Floodplain Management ............................................ 2-1

Chapter 3 Differences Between NFIP Requirements and the I-Codes ..................... 3-1

Chapter 4 Questions Related to Coordinating I-Codes and Floodplain Management Regulations ............................................................. 4-1

Chapter 5 Increasing Resistance to Flood Damage ........................................... 5-1

Chapter 6 Model Code-Coordinated Floodplain Management Ordinances................ 6-1

Appendices

Appendix A: References and Resources

Appendix B: Sample Plan Review and Inspection Checklists

Figures

Figure 1-1: Relationship of NFIP regulations to building code flood provisions.............................. 1-3

Figure 1-2: FEMA Regions ....................................................................................................... 1-5

Figure 2-1: Approaches to fulfilling the requirements of the NFIP .............................................. 2-11

Figure 3-1: FEMA FIRMs and riverine flood zone terminology.................................................... 3-13

Figure 3-2: FEMA FIRMs and coastal flood zone terminology .................................................... 3-14

Figure 3-3: Illustration of floodway concept............................................................................. 3-15

Figure 3-4: Coastal flood zones ............................................................................................. 3-23

Figure 3-5: Sample FIRM with LiMWA..................................................................................... 3-24

Figure 5-1: Annual NFIP flood insurance premium costs based on lowest floor elevation (percentages are savings or increases over at-BFE premiums)................................ 5-8

Tables

Table 3-1: Contents of this Chapter: Differences Between NFIP Requirements and the I-Codes ..... 3-2

Table 3-2: Summary of Selected Elevation Requirements in ASCE 24-14................................... 3-21

Table 3-3: Summary of Selected Elevation Requirements in ASCE 24-05................................... 3-22

Table 4-1: Contents of this Chapter: Questions Related to Coordinating I-Codes and Floodplain Management Regulations ................................................................... 4-2

vi Reducing Flood Losses Through the International Codes

Table 5-1: Maximum Allowable Credits for Selected CRS Activity 430 Higher Regulatory Standards That Affect the Design of Buildings and Structures ................................ 5-4

Table 5-2: Contents of this Section: Higher Standards for Buildings and Structures in the I-Codes ............................................................................................................... 5-7

Table 5-3: Contents of this Section: Amending IBC Appendix G for Other Higher Standards ......... 5-34

Table 6-1: Selecting the Applicable Code-Coordinated Model Ordinance...................................... 6-1

Worksheets

Worksheet A. The NFIP and the I-Codes (2018/2015/2012) ..................................................... 2-8

Worksheet B. Examining Community Approaches ...................................................................... 2-9